Optical properties and aging of PbS quantum dots embedded in a porous matrix.

被引：3
|
作者：
Litvin, Aleksandr P. [1 ]
Parfenov, Peter S. [1 ]
Ushakova, Elena V. [1 ]
Fedorov, Anatoly V. [1 ]
Artemyev, Mikhail V. [2 ]
Prudnikau, Anatoly V. [2 ]
Rukhlenko, Ivan D. [3 ]
Baranov, Alexander V. [1 ]
机构：
[1] Natl Res Univ Informat Technol Mech & Opt, 49 Kronverkskiy Pr, St Petersburg 197101, Russia
[2] Belarusian State Univ, Minsk, BELARUS
[3] Monash Univ, Clayton, Vic 3800, Australia
来源：
NANOPHOTONIC MATERIALS X | 2013年 / 8807卷
关键词：
Quantum dots; luminescence; near-infrared region; PbS; luminescence lifetimes; porous matrix; ENERGY-TRANSFER; LUMINESCENCE; DECAY;
D O I：
10.1117/12.2023025
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
PbS quantum dots (QDs) with diameter of 2.9-7.4 nm were embedded into a porous matrix. The samples prepared by developed low-cost effortless method demonstrate linear dependencies of optical density and luminescence intensity on the QDs concentration and perfect homogeneity. Optical properties of quantum dots in the matrix were studied using absorption and steady-state and time-resolved photoluminescence spectroscopy. Luminescence lifetimes were found to be size-dependent and increase with decreasing of QDs size. The aging behavior of PbS QDs in a porous matrix was explored for a variety of QDs sizes. The energy transfer process in quasi-monodispersed PbS QDs ensemble was discovered.
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页数：7
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